[PATCH 0/1] MR9695: win32u: Require VK_KHR_external_semaphore_fd for keyed mutexes.

[Rémi Bernon]

We need to use vkImportSemaphoreFdKHR to import the keyed mutex sync
object, and it will be NULL if the extension hasn't been enabled.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9695